Electrical Safety Standards Quiz
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Questions and Answers

What is the purpose of an electric shock risk assessment?

  • To determine the design of electrical equipment and operating conditions
  • To select and implement additional protective measures
  • To document the results of the risk assessment
  • To identify electric shock hazards and estimate the likelihood and severity of injury or damage to health (correct)
  • What factors should be considered when estimating the likelihood and severity of injury from electric shock?

  • The location of the electrical equipment in the facility
  • The type of PPE required and its cost
  • The design of the electrical equipment and its operating condition (correct)
  • The cost of additional protective measures and their availability
  • When additional protective measures are required, what should be determined if the use of PPE is included?

  • The voltage to which personnel will be exposed and the boundary requirements (correct)
  • The location of the electrical equipment in the facility
  • The design of the electrical equipment and its operating condition
  • The type of PPE required and its cost
  • What is a requirement after performing an electric shock risk assessment?

    <p>The results of the assessment shall be documented</p> Signup and view all the answers

    What information must be included on a label for electrical equipment in other than dwelling units?

    <p>Nominal system voltage, arc flash boundary, and incident energy or arc flash PPE category</p> Signup and view all the answers

    Under what conditions can labels applied prior to the effective date of the standard be acceptable?

    <p>If they complied with the requirements for equipment labeling in the standard at the time of application</p> Signup and view all the answers

    In supervised industrial installations, how often should the data supporting the information on the label be reviewed for accuracy?

    <p>At intervals not to exceed 5 years</p> Signup and view all the answers

    Who is responsible for the documentation, installation, and maintenance of the marked label for electrical equipment?

    <p>The owner of the electrical equipment</p> Signup and view all the answers

    What information is permitted to be documented in a supervised industrial installation where only qualified persons monitor and service the system?

    <p>Information required in 130.5(H)(1) through 130.5(H)(3)</p> Signup and view all the answers

    What is the exception for changes in electrical distribution systems rendering the label inaccurate?

    <p>Labels are acceptable if they complied with the requirements for equipment labeling at the time of application</p> Signup and view all the answers

    What documentation is required for the method of calculating incident energy and the data supporting the label information?

    <p>The method of calculating incident energy and the data supporting the label information shall be documented</p> Signup and view all the answers

    What should the label for electrical equipment be of, to withstand the environment involved?

    <p>Sufficient durability</p> Signup and view all the answers

    What are the two types of approach boundaries for electric shock protection?

    <p>Limited approach boundary and restricted approach boundary</p> Signup and view all the answers

    When can unqualified persons approach energized conductors closer than the limited approach boundary?

    <p>They are prohibited from doing so</p> Signup and view all the answers

    Under what conditions can qualified persons approach closer than the restricted approach boundary to energized conductors?

    <p>When specific conditions are met</p> Signup and view all the answers

    What is required to identify hazards, estimate likelihood and severity of injury, and determine necessary protective measures related to arc flash?

    <p>Arc flash risk assessment</p> Signup and view all the answers

    What is considered in the likelihood and severity assessment for arc flash risk?

    <p>Equipment design, overcurrent protective device, and operating condition</p> Signup and view all the answers

    How must additional protective measures, including PPE, be selected and implemented?

    <p>According to the hierarchy of risk control</p> Signup and view all the answers

    What is the arc flash boundary?

    <p>The distance at which incident energy equals 1.2 cal/cm2 (5 J/cm2)</p> Signup and view all the answers

    How can arc flash PPE selection be based on?

    <p>Incident energy analysis or arc flash PPE category method, but not both</p> Signup and view all the answers

    When should incident energy analysis be updated?

    <p>When system changes occur</p> Signup and view all the answers

    An electric shock risk assessment is not required to identify electric shock hazards, estimate the likelihood of occurrence of injury or damage to health, and determine if additional protective measures are required.

    <p>False</p> Signup and view all the answers

    The estimate of likelihood of occurrence of injury or damage to health and the potential severity of injury or damage to health does not need to take into consideration the design and operating condition of the electrical equipment.

    <p>False</p> Signup and view all the answers

    When additional protective measures are required, they do not need to be selected and implemented according to the hierarchy of risk control identified in 110.3(H)(3).

    <p>False</p> Signup and view all the answers

    The results of the electric shock risk assessment are not required to be documented.

    <p>False</p> Signup and view all the answers

    Electrical equipment in other than dwelling units that are likely to require examination, adjustment, servicing, or maintenance while energized must be marked with a label containing the nominal system voltage, arc flash boundary, and at least one of the following: available incident energy and corresponding working distance, or the arc flash PPE category, or minimum arc rating of clothing, or site-specific level of PPE.

    <p>True</p> Signup and view all the answers

    Labels applied prior to the effective date of the standard will be acceptable if they complied with the requirements for equipment labeling in the standard in effect at the time the labels were applied.

    <p>True</p> Signup and view all the answers

    In supervised industrial installations, the information required for the label may be documented in a manner that is readily available to persons likely to perform examination, servicing, maintenance, and operation of the equipment while energized.

    <p>True</p> Signup and view all the answers

    The data supporting the information on the label for electrical equipment must be reviewed for accuracy at intervals not to exceed 5 years.

    <p>True</p> Signup and view all the answers

    The arc flash PPE selection can be based on the available incident energy and the corresponding working distance, or the arc flash PPE category, or the minimum arc rating of clothing, or the site-specific level of PPE.

    <p>True</p> Signup and view all the answers

    Unqualified persons can approach energized conductors closer than the limited approach boundary in supervised industrial installations where only qualified persons monitor and service the system.

    <p>False</p> Signup and view all the answers

    The owner of the electrical equipment is not responsible for the documentation, installation, and maintenance of the marked label.

    <p>False</p> Signup and view all the answers

    Changes in electrical distribution systems rendering the label inaccurate are not acceptable as exceptions.

    <p>False</p> Signup and view all the answers

    Unqualified persons are allowed to approach energized conductors closer than the limited approach boundary

    <p>False</p> Signup and view all the answers

    Qualified persons can approach closer than the restricted approach boundary to energized conductors under specific conditions

    <p>True</p> Signup and view all the answers

    Arc flash risk assessment is not required to identify hazards related to arc flash incidents

    <p>False</p> Signup and view all the answers

    Likelihood and severity assessment for arc flash risk considers equipment design, overcurrent protective device, and operating condition

    <p>True</p> Signup and view all the answers

    Arc flash PPE selection can only be based on incident energy analysis

    <p>False</p> Signup and view all the answers

    The arc flash boundary is the distance at which incident energy equals 1.2 cal/cm2 (5 J/cm2) and does not need to be documented

    <p>False</p> Signup and view all the answers

    Incident energy analysis should be based on the working distance from the arc source and must be updated when system changes occur

    <p>True</p> Signup and view all the answers

    Alerting methods in 130.8(O) must be used when unqualified persons work near the restricted approach boundary

    <p>False</p> Signup and view all the answers

    Unqualified persons can cross the limited approach boundary under continuous escort by a qualified person

    <p>True</p> Signup and view all the answers

    Qualified persons are prohibited from approaching closer than the limited approach boundary to energized conductors

    <p>False</p> Signup and view all the answers

    Additional protective measures, including PPE, must be selected and implemented according to the hierarchy of risk control

    <p>True</p> Signup and view all the answers

    The arc flash PPE selection can be based on incident energy analysis and arc flash PPE category method at the same time

    <p>False</p> Signup and view all the answers

    Study Notes

    Electrical Safety Standards Summary

    • Electric shock protection boundaries include limited approach boundary and restricted approach boundary
    • Table 130.4(E)(a) provides distances for various AC system voltages, and Table 130.4(E)(b) for various DC system voltages
    • Unqualified persons are prohibited from approaching energized conductors closer than the limited approach boundary
    • Alerting methods in 130.8(O) must be used when unqualified persons work near the limited approach boundary
    • Unqualified persons can only cross the limited approach boundary under continuous escort by a qualified person
    • Qualified persons are prohibited from approaching closer than the restricted approach boundary to energized conductors, unless specific conditions are met
    • Arc flash risk assessment is required to identify hazards, estimate likelihood and severity of injury, and determine necessary protective measures
    • Likelihood and severity assessment considers equipment design, overcurrent protective device, and operating condition
    • Additional protective measures, including PPE, must be selected and implemented according to the hierarchy of risk control
    • The arc flash boundary is the distance at which incident energy equals 1.2 cal/cm2 (5 J/cm2) and must be documented
    • Arc flash PPE selection can be based on incident energy analysis or arc flash PPE category method, but not both
    • Incident energy analysis should be based on the working distance from the arc source, and must be updated when system changes occur

    Electrical Safety Standards Summary

    • Electric shock protection boundaries include limited approach boundary and restricted approach boundary
    • Table 130.4(E)(a) provides distances for various AC system voltages, and Table 130.4(E)(b) for various DC system voltages
    • Unqualified persons are prohibited from approaching energized conductors closer than the limited approach boundary
    • Alerting methods in 130.8(O) must be used when unqualified persons work near the limited approach boundary
    • Unqualified persons can only cross the limited approach boundary under continuous escort by a qualified person
    • Qualified persons are prohibited from approaching closer than the restricted approach boundary to energized conductors, unless specific conditions are met
    • Arc flash risk assessment is required to identify hazards, estimate likelihood and severity of injury, and determine necessary protective measures
    • Likelihood and severity assessment considers equipment design, overcurrent protective device, and operating condition
    • Additional protective measures, including PPE, must be selected and implemented according to the hierarchy of risk control
    • The arc flash boundary is the distance at which incident energy equals 1.2 cal/cm2 (5 J/cm2) and must be documented
    • Arc flash PPE selection can be based on incident energy analysis or arc flash PPE category method, but not both
    • Incident energy analysis should be based on the working distance from the arc source, and must be updated when system changes occur

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    Description

    Test your knowledge of electrical safety standards with this summary quiz. Covering topics such as electric shock protection boundaries, alerting methods, arc flash risk assessment, and PPE selection, this quiz will help you reinforce your understanding of key safety measures in electrical work.

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